Lamp



FIG. 1 is a perspective view of a lamp showing our new design;

FIG. 2 is a front view thereof, the back view being identical;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a top view thereof.

The broken lines illustrating portions of the lamp form no part of the claimed design. 

CLAIM The ornamental design for a lamp, as shown and described. 